UNIBOR MINIBOR DRILL

Bohrmaster BHM-35 Portable Magnetic Drill: Compact, Powerful & Cost-Effective Steel Drilling

The Bohrmaster BHM-35 is a highly efficient and exceptionally lightweight portable magnetic drilling machine, specifically engineered for professional use in steel fabrication, construction, and general engineering. Developed by Universal Drilling (Unibor), the BHM-35 offers a blend of reliable performance, advanced features, and remarkable value, making it an ideal choice for accurate hole drilling on site or in the workshop.

Features

• Powerful 1050W / 850W Motor: The BHM-35 is equipped with a robust electric motor, typically rated at 1050 watts (1.05 kW) in some older specifications, or a more recent efficient 850W motor that maintains strong performance. This ensures efficient drilling through various ferrous metals.
• Optimal Drilling Capacity:
  • Annular Cutters: Capable of drilling holes with annular cutters (broaching cutters) up to 35mm (1-3/8 inches) in diameter. This allows for fast and clean hole creation by removing only the periphery of the material.
  • Twist Drills: Can also accommodate standard twist drills up to 13mm (1/2 inch) in diameter (requires a drill chuck adapter, usually sold separately).
  • Countersinking: Capable of countersinking up to 35mm diameter.
• Super Lightweight & Compact Design: Weighing in at approximately 8.5 kg (18.7 lbs), the BHM-35 is notably lighter than many competitors in its class. This lightweight design, combined with its compact dimensions, makes it exceptionally manoeuvrable, easy to transport, and ideal for working in tight spaces, at height, or in awkward orientations.
• Strong Magnetic Adhesion (1000 kgf / 2205 lbs): Features a powerful electromagnet that provides excellent clamping force to ferrous metal surfaces (typically 1000 kgf or 2205 lbs). This ensures secure and stable positioning during drilling, enhancing both accuracy and operator safety.
• Single Speed (450 RPM or 750 RPM No-Load): The BHM-35 typically operates at a fixed optimal speed (e.g., 450 RPM loaded, 750 RPM no-load). This single-speed design simplifies operation and is well-suited for its primary annular cutter capacity.
• Adjustable Reach / Stroke: Offers a sufficient stroke length (typically 90-105mm) and often an adjustable reach, providing flexibility for different cutter lengths and enabling deeper holes when needed.
• Integrated Oil Feed System: Includes an integral oil feed system (often gravity-fed) to deliver coolant directly to the cutting edge of the annular cutter. This is crucial for cooling the bit, lubricating the cut, improving cutting performance, and significantly extending cutter life.
• Safety Features:
  • Safety Chain/Strap: Supplied with a safety chain or strap for an additional layer of security, especially when working vertically or overhead, preventing the drill from falling in case of power loss or magnetic failure.
  • Protective Guard: Often includes a safety guard to protect the operator from swarf and rotating parts.
• High Value Proposition: The Bohrmaster BHM-35 is marketed as a very competitively priced mag drill, offering robust features and reliable performance at an accessible price point.
• Durable Construction: Built with quality components, reflecting its "German engineering with Sheffield quality control" heritage, ensuring durability and a long service life in demanding environments.

Applications

The Bohrmaster BHM-35 Magnetic Drill is an ideal tool for a wide range of metalworking and construction applications:

• Steel Fabrication: Drilling holes in beams, plates, columns, and other structural components in workshops.
• On-site Construction: Perfect for steel erection, bridge building, and general construction where portability and secure drilling are required.
• Maintenance & Repair: Drilling holes for repairs, modifications, and installation of new components in existing steel structures.
• Pipework & Flanges: Creating precise holes in pipes and flanges for connections.
• Mechanical Engineering: Any application requiring accurate and efficient hole drilling in ferrous metals.
• Overhead & Vertical Drilling: Its strong magnet and lightweight design make it suitable for non-horizontal surface applications, with the use of the safety chain.